Gas generant compositions comprising melamine oxalate for use in automotive restraint devices
AssigneeAutoliv ASP, Inc.
InventorsIvan V. Mendenhall, Gary K. Lund
Life of this patent
Estimating the term…
Abstract
A gas generant composition for passive inflatable restraint systems (e.g., airbags) for automobiles is provided that comprises a melamine oxalate compound. The gas generant may be a cool burning gas generant composition that comprises a melamine oxalate compound, a co-fuel, such as guanidine nitrate, and an oxidizer, such as basic copper nitrate. The gas generant composition has advantageous combustion properties, including a maximum flame temperature at combustion (Tc) of ≤about 1700K (1,427° C.), a linear burn rate of ≥about 18 mm per second at a pressure of about 10 megapascals (MPa), a gas yield of the gas generant composition of ≥about 5.7 moles/100 cm3, and a linear burn rate pressure exponent of ≤about 0.35.
Claims11
A cool burning gas generant composition for an automotive inflatable restraint system comprising:
- a melamine monoxalate compound having a molar ratio of melamine to oxalic acid of about 1:1;
- guanidine nitrate;
- and
- basic copper nitrate, wherein the gas generant composition has a maximum flame temperature at combustion (Tc) of less than or equal to about 1600K (1,327° C.), a linear burn rate of greater than or equal to about 18 mm per second at a pressure of about 10 megapascals (MPa), a gas yield of the gas generant of greater than or equal to about 5.7 moles/100 cm3, and a linear burn rate pressure exponent of less than or equal to about 0.35.
A cool burning gas generant composition for an automotive inflatable restraint system comprising:
- a dimelamine trioxalate compound, wherein the dimelamine trioxalate compound having a molar ratio of melamine to oxalic acid of about 2:3;
- guanidine nitrate;
- and
- basic copper nitrate, wherein the gas generant composition has a maximum flame temperature at combustion (Tc) of less than or equal to about 1520K (1,247° C.), a linear burn rate of greater than or equal to about 18 mm per second at a pressure of about 10 megapascals (MPa), a gas yield of the gas generant of greater than or equal to about 5.7 moles/100 cm3, and a linear burn rate pressure exponent of less than or equal to about 0.35.
Dependencies are inferred from the claim text.